From: Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Date: Sun, 28 Jul 2013 03:23:32 +0000 (+0000)
Subject: [PowerPC] Add comment explaining preprocessor directive.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=f5b9110ce1e0d5bc6f96b1e74d110f0cc576324a;p=oota-llvm.git

[PowerPC] Add comment explaining preprocessor directive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187320 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCJITInfo.cpp b/lib/Target/PowerPC/PPCJITInfo.cpp
index 18f4adf839e..5e3a48d8bbd 100644
--- a/lib/Target/PowerPC/PPCJITInfo.cpp
+++ b/lib/Target/PowerPC/PPCJITInfo.cpp
@@ -71,6 +71,8 @@ static void EmitBranchToAt(uint64_t At, uint64_t To, bool isCall, bool is64Bit){
 extern "C" void PPC32CompilationCallback();
 extern "C" void PPC64CompilationCallback();
 
+// The first clause of the preprocessor directive looks wrong, but it is
+// necessary when compiling this code on non-PowerPC hosts.
 #if (!defined(__ppc__) && !defined(__powerpc__)) || defined(__powerpc64__) || defined(__ppc64__)
 void PPC32CompilationCallback() {
   llvm_unreachable("This is not a 32bit PowerPC, you can't execute this!");